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Question
Which of the following metals is obtained by leaching its ore with dilute cyanide solution?
Options
Silver
Titanium
Vanadium
Zinc
MCQ
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Solution
Silver
Explanation:
Silver is obtained by leaching its ore with a dilute cyanide solution in a process called the MacArthur-Forrest cyanide process. In this method, the silver ore (argentite) is treated with a dilute solution of sodium cyanide, which dissolves silver to form a soluble complex called sodium argentocyanide. Silver is then recovered from this complex by adding scrap zinc. This process is widely used for the extraction of silver from low-grade ores.
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